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Altitudinal variation in the diet of sika deer on the Izu Peninsula: patterns in the transitional zone of geographic variation along the Japanese archipelago

100%

Kitamura T., Sato Y., Takatsuki S.

Acta Theriologica

2010

tom 55

nr 1

89-93

Geographical variation in the diet of sika deer Cervus nippon Temminck, 1838 has been well characterised: northern populations are grazers, whereas southern deer are browsers. This variation largely reflects genetic-based differences in morphology. However, environmental factors would be also important. If a same genetic population live in different habitats, we can check altitudinal shifts in sika deer food consumption. We hypothesised that changes in the diet of the sika deer population on the Izu Peninsula, which is located within the transitional zone of resource (vegetation) variation and encompasses a broad altitudinal range, would mirror shifts in the composition of vegetation. Analyses of the rumen contents of the deer population indicated that dwarf bamboo accounted for 10.5, 46.2, and 74.3% of the deer diet in the low (<800 m), middle (800–1000 m), and high (>1000 m) altitudinal zones, respectively. In contrast, evergreen broad-leaved species accounted for 35.7, 23.1, and 5.9%, respectively. These results suggest that the diet of sika deer is more strongly affected by environmental factors, such as plant community composition, than by genetic factors.

Ultrastructural study on the Harderian gland of the rabbit [Oryctolagus cuniculus]

76%

Shirama K., Satoh T., Yokoyama Y., Kano K., Kitamura T., Yamada J.

Folia Morphologica

1996

tom 55

nr 3

Ograniczanie wyników

1 Acta Theriologica

1 Folia Morphologica

2 Kitamura T.

1 Kano K.

1 Sato Y.

1 Satoh T.

1 Shirama K.

1 Takatsuki S.

1 Yamada J.

1 Yokoyama Y.

1 2010

1 1996

Wyniki wyszukiwania

Altitudinal variation in the diet of sika deer on the Izu Peninsula: patterns in the transitional zone of geographic variation along the Japanese archipelago

Ultrastructural study on the Harderian gland of the rabbit [Oryctolagus cuniculus]